Tafsir of Al-Inshiqaq 84:9

And will return to his family Masrur! This means that he will return to his family in Paradise. This was said by Qatadah and Ad-Dahhak. They also said, "Masrur means happy and delighted by what Allah has given him.'' Allah said;

وأما من أوتي كتابه وراء ظهره